Why It’s Not Just the Caliber That Matters, but the Bullet Too

This is why there is such a wide variety of bullets available for the same caliber, such as .338 Lapua Magnum. The reason for this is that different shooting tasks require different solutions. One bullet cannot be universal, as its behavior can vary significantly depending on its design. In precision shooting, every element counts, and the choice of bullet is crucial.

Different bullets vary in weight, shape, core type, and bottom design. The weight of the bullet, for example, 250 grains vs. 300 grains, directly affects the ballistic coefficient and lateral load. A heavier bullet resists the wind better and retains its kinetic energy over long distances, but requires a higher charge. A lighter bullet, on the other hand, requires a lower charge but loses its speed more quickly.

The leading part, or nose of the bullet, is a key factor in its aerodynamics. The longer and sharper the nose, the higher the ballistic coefficient. This allows the bullet to travel further and faster, with less resistance from the air. However, a long, pointed bullet requires a faster rifling pitch for stabilization. The core of the bullet determines its mechanical properties. A heavy lead core encased in a cupronickel or brass jacket is a classic target bullet. It is designed for stability and accuracy. Bullets with an armor-piercing steel core have different balancing and inertial characteristics, which negatively affects accuracy. Fully copper bullets without lead, so-called monometallic bullets, interact differently with the barrel and gas pressure, which also requires adjustment.

Why can't you shoot anything? A rifle that's been zeroed for a specific type of cartridge is a balanced system. When you change the bullet, even within the same caliber and weight, you're changing the entire ballistics. Different powder charges, different pressures, different times the bullet spends in the barrel, different recoil, and, as a result, a shift in the point of impact. A high-precision rifle is zeroed for a specific cartridge, and changing the bullet will require a new full zeroing, and often won't give the desired accuracy at all, because the barrel may not "like" that particular bullet. Some bullets are optimized for short barrels, while others are optimized for long barrels, and selecting them is an empirical process

Choosing the right bullet for high-precision shooting is a matter of predictability. At distances of a kilometer or more, even minor deviations in initial velocity, stability, or aerodynamics can lead to a miss. The shooter must know exactly how their bullet will behave in flight, how it will react to wind, and how it will penetrate the target. The оживальная часть определяет, насколько легко пуля "поймает" ветер, а сердечник влияет на стабильность ее вращения и деформацию при попадании. Using the wrong bullet negates all the efforts to calculate the corrections, making the system unstable and unpredictable. Thus, the variety of bullets is not a marketing ploy, but a necessity that allows the shooter to choose the perfect tool for a specific target, whether it's shooting at a 1,500-meter target or hunting large game.

But in the case of solid copper-milled bullets, which are milled from a copper alloy and are identical to each other under certain production conditions, the story can change dramatically, as modern milled bullets have the technology to create a milled bullet with a geometry that reduces the pressure in the barrel by approximately two times compared to a stamped bullet! This can allow the bullet to reach higher speeds, increasing its ballistic coefficient, flight characteristics, and effective range. Such bullets require even more speed and, consequently, more charge.